.header {
    width: 100%;
    height: 100px;
    text-align: center;
    input {
        width: 95%;
        margin: auto;
        display: block;
        height: 30px;
        padding-left: 20px;
        border: none;
        outline: none;
        border-radius: 5px;
        background-color: #ccc;
        box-sizing: border-box;
    }
}